The addition of speedy wide receiver Brandin Cooks in a trade with the New Orleans Saints gives quarterback Tom Brady one of the deepest receiving corps of his career. It’s so deep, veteran Danny Amendola might find himself sixth on the depth chart. Cooks, 23, is coming off a season in which he caught 78 passes for 1,173 yards and eight touchdowns. He’ll be paired opposite Julian Edelman, who caught 98 passes for a career-high 1,106 yards and three…